Device for selecting a hydraulic circuit overall capacity

Details Device for selecting a hydraulic circuit overall capacity Device for selecting a hydraulic circuit overall capacity

2006-05-17

2010-11-23

Winner, Tony H. (Department: 3611)

Motor vehicles

Having four wheels driven

With manually operated means for disengaging drive to one or...

C060S427000

Reexamination Certificate

active

07836993

ABSTRACT:
A hydraulic circuit including a first motor set, and a second motor set for driving vehicle-moving means situated one behind the other. The circuit has first, second, third, and fourth main ducts for feeding the motor sets in parallel. The device includes a selector suitable for taking up a first stable position making the feeding in parallel possible by interconnecting in pairs the feed and discharge main ducts, and for taking up a second stable position in which one of the motor sets is inactive because one of the main ducts is connected to one of main ducts of the other set. Between the stable positions, the selector can take up a temporary position, in which all four main ducts are interconnected. At least while the selector is moving in one direction between its two stable positions, the temporary position is sustained in an intermediate stage during which at least one of the interconnections between the main ducts of the first and second motor sets is constricted.

REFERENCES:
patent: 3656570 (1972-04-01), Gortnar et al.
patent: 3900075 (1975-08-01), Chichester et al.
patent: 3916625 (1975-11-01), Holtkamp
patent: 3978937 (1976-09-01), Chichester et al.
patent: 5199525 (1993-04-01), Schueler
patent: 0 294 662 (1988-12-01), None
patent: 0547947 (1993-06-01), None
patent: 0 916 542 (1999-05-01), None
International Search Report-PCT/FR2006/050451.

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